Well, we don't have mysis shrimp in Singapore, save for a few non-feeder colonies in tank systems. What else can act as a genuine diet for cuttlefish hatchlings, in the case of sepia bandensis or even metasepia spp, which seem strangely to be more common here. What is the size of the food item that hatchling cuttles can accept? Here's a list of local shrimp species. Scroll to the bottom. http://www.wildsingapore.com/wildfacts/crustacea/othercrust/shrimp/shrimp.htm Thanks!